ARUP's Laboratory Test Directory

Coxiella burnetii (Q-Fever) Antibody IgG, Phase I & II by IFA : 0050462

Mnemonic: Q-F 1,2

Methodology: Indirect Fluorescent Antibody
Performed: Tue, Fri
Reported: 1-5 days
Specimen Required: Collect:  One 4 mL serum separator tube.

Transport:  1 mL serum at 2-8°C. (Min: 0.5 mL)  Submit specimen in an ARUP Standard Transport Tube.

Pediatric Collection/Transport:  0.15 mL serum at 2-8°C.

Remarks:  Separate serum from cells ASAP. Acute and convalescent specimens should be labeled as such; parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens. Please mark specimen plainly as "acute" and "convalescent."

Unacceptable Conditions:  Severely lipemic, hemolyzed, or contaminated specimens.

Stability:  After separation from cells: Ambient: 2 days; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)
Reference Interval:
Phase I: < 1:16 No antibody detected.
Phase II: < 1:16 No antibody detected.
Interpretive Data: Single phase II IgG titers of 1:256 and greater are considered evidence of C. burnetii infection at some time prior to the date of the serum specimen. Phase I antibody titers of 1:16 and greater are consistent with chronic infection or convalescent phase of Q-fever.
CPT Code(s): 86638 Q-Fever Phase I; 86638 Q-Fever Phase II
 
 

 

 

 
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